Ciao Marco,

would you be so kind to add your question also at the talk page of the page ? http://en.wikiversity.org/wiki/Introduction_to_finite_elements/Axial_bar_fin...

Not every Wikiversity participant is subscribed to this list. Then your chances of a reply increase.

Thanks, Erkan YILMAZ

On Mon, Mar 3, 2008 at 11:29 AM, Marco Siracusano < marco.siracusano@fastwebnet.it> wrote:

Referring to Wikiversity's tutorial "Introduction to finite elements/Axial bar finite element solution" I'd like to know why, on calculation of matrix Kij, the element K33 is equal to 1/h3 (and so, taking all the elements equal to 1/h, K33=1) and afterwards, when the matrix Kij is written in numeric form, K33=2. Really, taking K33=1 det(K)=0 and when K33=2 det(K)=1. I think that the value of the the element K33 has been modified taking into account boundary conditions. Otherwise? Thanks for your answers. Marco Siracusano marco.siracusano@fastwebnet.it

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